Matter and Energy in Ecosystems Key Concepts

Climbing ivy grows on the sides of buildings. The ivy on one building has been taking in carbon from the air for several hours.

Is the ivy in sunlight? What has happened to the number of molecules that store energy in the ivy plants?

The ivy . . .

• is in sunlight. The number of molecules that store energy in the ivy has decreased.

• is in sunlight. The number of molecules that store energy in the ivy has increased.

• is not in sunlight. The number of molecules that store energy in the ivy has decreased.

• is not in sunlight. The number of molecules that store energy in the ivy has increased.

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NGSS.MS-LS2-3

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Which of the following organisms make energy storage molecules?

• Consumers

• Abiotic matter

• Decomposers

• Producers

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The process by which green plants turn water, carbon dioxide, and sunlight into energy in order to grow.

• Cellular Respiration

• Photosynthesis

• Ecosystem

• Biotic matter

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NGSS.MS-LS1-6

Without decomposers, what would happen to the carbon in the ecosystem?

• Carbon would escape into the air

• Carbon would form into carbon dioxide molecules

• Carbon would stay trapped inside of dead matter

• Carbon would be destroyed

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NGSS.MS-LS2-3

Algae are producers in ecosystems. Algae can...

• take in carbon from the air. The carbon is used to make energy storage molecules.

• take in carbon from the air. The carbon is used to break down energy storage molecules.

• give off carbon to the air. Giving off carbon allows them to make energy storage molecules.

• give off carbon to the air. Giving off carbon uses up energy storage molecules

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What are the REACTANTS (starting substances) for photosynthesis?

• glucose and oxygen

• water and carbon dioxide (and sunlight)

• glucose and carbon dioxide

• carbon dioxide and oxygen

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What are the PRODUCTS of photosynthesis?

• water and carbon dioxide (and sunlight)

• water and oxygen

• glucose and oxygen

• glucose and sunlight

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Sunflowers have been in the sunlight since early morning. Sunflowers are producers. The sunflowers can...

• give off carbon to the air. Giving off carbon allows them to make energy storage molecules.

• give off carbon to the air. Giving off carbon uses up energy storage molecules.

• take in carbon from the air. The carbon is used to break down energy storage molecules.

• take in carbon from the air. The carbon is used to make energy storage molecules.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Manatees are animals that live in the ocean and eat grasses. The sun is shining on the ocean water. What is happening to the carbon in the water around the grasses and manatees?

• Carbon is NOT moving into the water; it is ONLY moving out of the water.

• With this information, there is no way to know for sure.

• Carbon is moving into the water AND out of the water, at the same time.

• Carbon is ONLY moving into the water; it is NOT moving out of the water.

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NGSS.MS-LS2-3

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Water buffalos spend a lot of their time in the water, but they come out of the water to eat grass. Think about a water buffalo in the middle of the night. The sun is not shining, and the water buffalos are not eating grass.

What is happening to the carbon in the air around the water buffalo?

• Carbon is not moving into the air; it is only moving out of the air.

• Carbon is moving into the air AND out of the air, at the same time.

• Carbon is only moving into the air; it is not moving out of the air.

• With this information, there is no way to know for sure.